Fair Value Disclosures - Assets and Liabilities Measured at Fair Value on a Non-recurring Basis (Details) - USD ($) $ in Thousands			12 Months Ended
	Aug. 01, 2016	Aug. 01, 2015	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange ownership interest, impairment loss			$ 1,284	$ 1,289
Goodwill, carrying value			1,640,653	1,656,588	$ 1,662,636
Goodwill impairment			0	0	54,000
Exchange and clearing organization membership interests and registrations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange ownership interest, impairment loss	$ 1,300	$ 1,300	1,284	1,289
Futures Reporting Unit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill impairment					51,900
International Asset Management Reporting Unit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill impairment					2,100
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, carrying value					0
Goodwill impairment					51,900
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, carrying value					0
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, carrying value					0
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Exchange and clearing organization membership interests and registrations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange ownership interest, carrying value			2,716	4,178	5,608
Exchange ownership interest, impairment loss			1,284	1,289	178
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Exchange and clearing organization membership interests and registrations [Member] | Other Expenses [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange ownership interest, impairment loss			1,300	1,300	200
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Exchange and clearing organization membership interests and registrations [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange ownership interest, fair value			2,716	4,178	5,608
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Exchange and clearing organization membership interests and registrations [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange ownership interest, fair value			$ 0	$ 0	0
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Customer relationships [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Intangible assets, carrying value					0
Intangible assets, impairment loss					7,534
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Customer relationships [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Intangible assets, carrying value					0
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Customer relationships [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Intangible assets, carrying value					0
Fair Value, Measurements, Nonrecurring [Member] | International Asset Management Reporting Unit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, carrying value					0
Goodwill impairment					2,100
Intangible assets, carrying value					0
Intangible assets, impairment loss					60
Fair Value, Measurements, Nonrecurring [Member] | International Asset Management Reporting Unit [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, carrying value					0
Intangible assets, carrying value					0
Fair Value, Measurements, Nonrecurring [Member] | International Asset Management Reporting Unit [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, carrying value					0
Intangible assets, carrying value					$ 0